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kamilsss655 / ESPRI

ESPRI (ESP Radio Interface) project providing extended functionalities to ham radios
Apache License 2.0
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[FEATURE] Output PDM audio on GPIO pin (DAC) #3

Closed kamilsss655 closed 3 months ago

kamilsss655 commented 4 months ago

Is your feature request related to a problem? Please describe.

We need to be able to output audio from ESP to host radio. That would be a building block for future scrambling and digital modes.

Describe the solution you'd like

For initial tests:

  1. Load pre-recorded PDM audio sample.
  2. Output the PDM audio to GPIO pin.
  3. Make sure the audio can be heard by connecting headphones to the GPIO pin.

Additional context

Here is a website that describes in detail how this can be done: https://hackaday.com/2024/01/06/no-dac-try-pdm/

kamilsss655 commented 3 months ago

done